package com.yhg.qxmall.auth.controller;

import com.alibaba.fastjson.TypeReference;
import com.yhg.common.constant.AuthServerConstant;
import com.yhg.common.exception.BizCodeEnume;
import com.yhg.common.utils.R;
import com.yhg.common.vo.MemberRespVo;
import com.yhg.qxmall.auth.feign.MemberFeignService;
import com.yhg.qxmall.auth.feign.ThirdPartFeignService;
import com.yhg.qxmall.auth.vo.UserLoginVo;
import com.yhg.qxmall.auth.vo.UserRegisterVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.util.StringUtils;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import javax.validation.constraints.NotEmpty;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

import static com.yhg.common.constant.AuthServerConstant.LOGIN_USER;

/**
 * @author 凌月青缃
 * @date 2020/10/20
 */
@Controller

public class LoginController {

    @Autowired
    ThirdPartFeignService thirdPartFeignService;

    @Autowired
    StringRedisTemplate redisTemplate;

    @Autowired
    MemberFeignService memberFeignService;

    @ResponseBody
    @GetMapping("/sms/sendCode")
    public R sendCode(@RequestParam("phone") String phone){

        //TODO 1、接口防刷

        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if (!StringUtils.isEmpty(redisCode)){
            long l = Long.parseLong(redisCode.split("_")[1]);
            if (System.currentTimeMillis() - l < 60000){
                //60s内不能再发
                return R.error(BizCodeEnume.SMS_CODE_EXCEPTION.getCode(),BizCodeEnume.SMS_CODE_EXCEPTION.getMsg());

            }
        }


        //2、验证码的再次校验。redis，存key-phone ,value-code   sms:code:
        String code = UUID.randomUUID().toString().substring(0, 5);
        String substring = code+"_"+System.currentTimeMillis();
        //redis缓存验证码，防止同一个手机号60s内再次发送验证码

        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX+phone,substring,10, TimeUnit.MINUTES);

        thirdPartFeignService.sendCode(phone,code);
        return R.ok();
    }

    @GetMapping(value = "/login.html")
    public String loginPage(HttpSession session) {

        //从session先取出来用户的信息，判断用户是否已经登录过了
        Object attribute = session.getAttribute(LOGIN_USER);
        //如果用户没登录那就跳转到登录页面
        if (attribute == null) {
            return "login";
        } else {
            return "redirect:http://qxmall.com";
        }

    }

    /**
     *TODO: 重定向携带数据：利用session原理，将数据放在session中。
     * 只要跳转到下一个页面取出这个数据以后，session里面的数据就会删掉
     * 分布下session问题
     *
     * @param vo
     * @param result
     * @param redirectAttributes 模拟重定向携带数据
     * @return
     */
    @PostMapping("/regist")
    public String regist(@Valid UserRegisterVo vo , BindingResult result , RedirectAttributes redirectAttributes){
        if (result.hasErrors()){
            /**
             * .map(fieldError -> {
             *                 String field = fieldError.getField();
             *                 String defaultMessage = fieldError.getDefaultMessage();
             *                 errors.put(field,defaultMessage);
             *                 return
             *             })
             */
            Map<String, String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));

            redirectAttributes.addFlashAttribute("errors",errors);
            //校验出错，转发到注册页
            return "redirect:http://auth.qxmall.com/reg.html";
        }
        //真正的注册。调用远程服务进行注册
        //1.校验验证码
        String code = vo.getCode();
        String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if (StringUtils.isEmpty(s)){
            if (code.equals(s.split("_")[0])){
                //删除验证码,令牌机制
                redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
                //验证码通过。调用远程服务进行注册
                R r = memberFeignService.regist(vo);
                if (r.getCode() == 0){
                    //成功

                    return "redirect:http://auth.qxmall.com/login.html";
                }else {
                    //失败
                    Map<String, String> errors = new HashMap<>();
                    errors.put("msg", r.getData("msg",new TypeReference<String>(){}));
                    redirectAttributes.addFlashAttribute("errors",errors);
                    return "redirect:http://auth.qxmall.com/reg.html";
                }


            }else {
                Map<String, String> errors = new HashMap<>();
                errors.put("code","验证码错误");
                redirectAttributes.addFlashAttribute("errors",errors);
                return "redirect:http://auth.qxmall.com/reg.html";
            }

        }else {
            //校验出错，转发到注册页
            //效验出错回到注册页面
            Map<String, String> errors = new HashMap<>();
            errors.put("code","验证码错误");
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.qxmall.com/reg.html";
        }
    }

    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes redirectAttributes, HttpSession session) {


        //远程登录
        R login = memberFeignService.login(vo);

        if (login.getCode() == 0) {
            //成功
            MemberRespVo data = login.getData("data", new TypeReference<MemberRespVo>() {
            });
            session.setAttribute(LOGIN_USER, data);
            return "redirect:http://qxmall.com";
        } else {
            Map<String, String> errors = new HashMap<>();
            errors.put("msg", login.getData("msg", new TypeReference<String>() {
            }));
            redirectAttributes.addFlashAttribute("errors", errors);
            return "redirect:http://auth.qxmall.com/login.html";
        }
    }


}
